Effect of Processing Parameters on the Earing and Mechanical Properties of Strip Cast Type 3004 Al Alloy

摘要

Electrical resistivity, superficial hardness, tensile testing, and quantitative metallography techniques were used in this study. The strip cast type 3004 aluminum alloy received sixteen different ther-momechanical treatments before cups were drawn. The top edges of the drawn cups were not flat. Rather there were high points or ears with valleys between them. The homogenization temperature varied form 510 to 621 deg C at 24 h. Some samples received an additional 426 deg C/24 h homogenization anneal. Most specimens were rolled along the longitudinal direction of the as-cast material, and some were rolled in the transverse direction. Most samples were recrystallized at 454 deg C for 24 h in addition to the homogenization treatment. Some were recrystallized for 168 h. All samples were subsequently rolled to 0.33 mm for cup drawing and percent earing determination. The percent earing results of some samples were less than 1.5 percent, but the mechanical strength was also lowered. The high-temperature recrystallization anneal of 454 deg C was the controlling factor in determining the earing and mechanical strength of the final rolled